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Expanding fish productivity in Tasmanian saltmarsh wetlands through tidal re-connection and habitat repair

Citation

Prahalad, V and Harrison-Day, V and McQuillan, P and Creighton, C, Expanding fish productivity in Tasmanian saltmarsh wetlands through tidal re-connection and habitat repair, Marine and Freshwater Research pp. 1-12. ISSN 1323-1650 (2018) [Refereed Article]


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Copyright Statement

Copyright 2018 CSIRO

DOI: doi:10.1071/MF17154

Abstract

Fish use of coastal saltmarsh wetlands has been documented for many parts of Australia with the notable exception of Tasmania. An initial investigation to examine the diversity, density and patterns of fish use in the Circular Head coast saltmarshes of north-west Tasmania was undertaken. To aid decision making in repair strategies, the effect of saltmarsh condition on fish assemblages was studied using paired sites of predominantly unaltered and altered saltmarshes where levees were present. In all, 851 fish from 11 species were caught in 37 of the 48 pop nets. Three species, Aldrichetta forsteri, Arripis truttaceus and Rhombosolea tapirina, are important to commercial and recreational fisheries and contributed ,20% of the total catch numbers. The mean density of .72 fish per 100 m2 is the highest yet reported from Australian studies and indicates that Tasmanian saltmarshes provide higher value habitat for fish compared with elsewhere in Australia, likely due to more frequent and prolonged flooding, and the lack of adjacent mangroves. There was no significant difference in fish assemblages between unaltered and altered marshes. The results suggest that restoring basic saltmarsh structure through tidal reconnection will deliver substantial benefits for fish productivity through habitat expansion.

Item Details

Item Type:Refereed Article
Keywords:saltmarsh, fish, fisheries, restoration, coastal management, wetlands, biodiversity conservation
Research Division:Environmental Sciences
Research Group:Environmental Science and Management
Research Field:Wildlife and Habitat Management
Objective Division:Environment
Objective Group:Ecosystem Assessment and Management
Objective Field:Ecosystem Assessment and Management of Coastal and Estuarine Environments
Author:Prahalad, V (Mr Vishnu Prahalad)
Author:Harrison-Day, V (Ms Violet Harrison-Day)
Author:McQuillan, P (Mr Peter McQuillan)
ID Code:128280
Year Published:2018
Web of Science® Times Cited:1
Deposited By:Geography and Spatial Science
Deposited On:2018-09-12
Last Modified:2018-10-04
Downloads:3 View Download Statistics

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